*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    background-color: #f4f4f4;
}
.wrapper{
    width: 300px;
    margin: auto;
    padding: 10px;
    background-color: #fff;
}
.nav li {
    width: 50px;
    text-align: center;
    list-style: none;
    display: inline-block;
}
.nav li a{
    color: #3c3c3c;
    text-decoration: none;
    padding: 1px 1px;
}
.nav li a:hover{
    color: #ff4400;
}
.nav .active{
    font-weight: 700;
    border-bottom: 2px solid #ff4400;
}
.main{
    font-size: 12px;
}
.text1, .text2{
    padding-top: 20px;
}
.text1 span, .text2 span{
    margin-right: 5px;
}
.main>div{
    display: none;
}
.main .active{
    display: block;
}
.main>div:after{
    display: table;
    content: "";
    clear: both;
}
.main>div>div{
    float: left;
}
.main>div>div{
    width: 50%;
}
.font_color{
    color: #ff5000;
}